Lighting-fixture.



A. DEIVIPSEY.

LIGHHNG FIXTURE.

APPLICATION FILED OCT. 14 1925.

Patented June 26, E31? mm sm 2 SHEETS-SHEET x.

l/Vl/E/VTOR i A u QW Q'W B ATTOB'IVEV l. A. DEMPSEY.

LIGHTING FIXTURE.

APPLICATION FILED um. 14. I916.

Patented June 26, 19! 7.

2 SHEETS-SHEET 2.

JAMES ARTHUR IDEMPSJEY, OF NEW YQEK, Bl. Y.

LIGJEBE'G EIXT I in. .t'i

nearest.

specification. of Letters Patent.

Patented June 2% 191?.

Application filed oetober M, 1815. serial Ito. 55,777.

To all whom it may concern:

Be it known that l, James ARTHUR Dannsnr, a citizen of the UnitedStates, residing in the city of New York, the county of New York, andState of New York, have invented a new and useful Lighting-Fixture, ofwhich the following is a specification.

My invention relates to lighting fixtures of a type in which certain ofthe rays of light from. the source of illumination are reflected againstthe sides of a surrounding shield thence upward against reflectingsurfaces and so downward to the object to be ilhnninated it alsocontemplates a fixture in which both direct and indirect lighting may beutilized and accomplished. My invention further relates to devices whichmay he made both permanent or temporary fixtures and which areparticularly useful for the ill :11 1 tion of bllliard tables andsimilar purposes in which it is desired that an even light, withoutinequalities or shadows, shalhbe cast upon the object illuminated.

My invention especially relates to the peculiar means for accomplishingthe desired results as detailed hereinafter.

The objects of my invention are to provide a lighting fixture that shallbe effective in operation permitting an even diflusion of light withouthorizontal glare; to provide an inexpensive structure that may be formedof cheap materials; to permit easy and quick adjustment of parts and. astructure that can be readily attached or moved from place to lace. PThese objects ll accomplish by the means illustrated in the accompanyingdrawings and fully described and claimed hereinafter.

Figure l is a vertical sectional view of one form of my invention aportion being in elevation and broken away.

Fig. 2 is an invertedplan view of Fig.1.

Fig. 3 is an elevation of a detail of my device.

Fig. i is a vertical elevation of a modified form of my invention.

Fig. 5 is an inverted plan View of F1g. 4.

Figs. 6 and .7 are diagrammatic vlews of portions of the devicesillustrated 1n F gs. 1 and 4 showing the radiation and reflection of thediflerent rays of light on and from. the respective reflecting surfaces.

In the drawings like symbols of reference refer to like parts throughoutthe various views.

Referring to Figs. 1, 2 and 3. 1 is a central tube to which the invertedcone 2 is secured in any suitable manner. The reflector 3 is securedover the cone and. preferably also to the tube 1. The reflector 3 isprovided with hooks or other attaching means 4 to which are attachedchains or other supportlng means 5 from which depends an inverted cone 6preferably of opaque material through which the direct rays of light areunable to pass.

The tube 7 is designed and made to slide within the tube 1 beingfrictionally or other- Wise held in place therein (a clamping nut orequivalent device, not shown vmay be used if desired). The lower end oftube 7 carries an electric light socket and bulb 8, or it gas or otherilluminant is used. it carries the burner or other source of light.

9, (see also Fig. 3,) is a lens or bulls eye which may be corrugated orplain. lit is mounted in the band or collar 10 provided with theventilating apertures 11 and the whole placed at the bottom of the cone6. It may be detachable.

Referring to F igs. 4 and 5 i sometimes make the cone 2 and reflector3with flat sides so that the plan is square or polygonal, instead ofcircular as in Figs. 1 and 2. T also sometimes make the reflector 6 adouble truncated cone or prism the upper and lower portions of whichflare outwardly from approximately the median line aa.

My device may be quickly and economically constructed of light sheetmetal. and it will be understood that the reflecting surfaces may bepainted white or other desired color, enameled or coated with variouswell known preparations, or made of glass. burnished metal or othermaterial which possesses the proper reflecting qualities.

While the angles of the reflecting surfaces relative to each other andto the illuminator are not definite and unvariable,- they should be suchthat light reflected from one to the other will be diffused outwardlyand downwardly so as to give an even illumination,and T have found thebest ar rangement to be approximately that shown in the illustrationsherein.

It will also be understood that the reflection and focusing of the raysof light can be lltl tive to the reflector 3 and the illuminator 8. Insetting up and operating my device, I

first suspend or attach the reflector 3 and cone 2 at the proper pointas from or to the ceiling or chandelier fixture, which may be done bychains, pipe or other suitable means; the cone 6 is preferably suspendedby chains 5 in proper relation to the illuminator 8 and reflectors 2--3which may be determined by adjustment and trial;'the'illuminator itselfis adjusted by raising or lowering the tube 7.

I find a means of ventilation desirable especially where gas or thenitrogen electric bulb is used, which is attained by the perforatedcollar 10 as shown in Fig. 1 or through the open cone 6 as shown in'Fi4.

Referring to Fig. 6. Certain of the llght rays emanating from theilluminator impinge as at b directlyon the reflector 3 and are diverteddownward, others as a fall uponthe interior surface of the cone 6 arereflected upward to 2 thence to 3 and so downward and outward as shownin dotted and broken lines. a

f are rays of light that are transmitted directly through the lens orbulls eye 9 or if the latter is detached are shed directly outwardthrough the opening in the bottom of the cone 6. It will also beunderstood that when desired instead of using a light transmittingmedium as 9 I may close the opening in the bottom of the cone 6'completely, relying entirely upon reflected or indirect lighting.

Referring to Fig. 7 the description ispractically the same as in thecase of Fig. 6 ut in addition the rays of light represented by e-; areshown, the rays represented by the broken line e are first reflectedagainst the flaring bottom 6 and thence downward and outward while f arethe direct rays from the illuminator 8.

Since the cone 6 rises above and surrounds the illuminator 8 no directrays from the latter can pass out in a horizontal direction.

It will be understood that only a few of the rays of light areillustrated by the dot: ted and broken lines, an infinite number of raysbeing reflected at different angles and so forming a generalillumination.

It will be understood that the material, shape, proportions andarrangement of parts may be varied without departing from my invention,but what I claim and desire to protect by Letters Patent is,

1. A lighting fixture comprising a canopy the underneath surface ofwhich is a reflector; an inverted cone provided with an exteriorreflecting surface secured to the canopy; a central tubular memberwithin the cone and canopy; a member adjustably mounted in connectionwith the tubular member and adapted to be raised or lowered relativethereto. and on the lower end of which is secured an illuminator; aninvertras es? ed opaque cone surrounding said illuminator and having areflecting interior surface, said opaque cone being adjustably securedto the canopy so as to permit adjustment relative to the illuminator andthe other reflecting surfaces.

2. A lighting fixture comprising a canopy, the underneath surface ofwhich is a reflector; an inverted cone provided with an exteriorreflecting surface secured to the canopy; a central tube joining thecone and the canopy and extending therethrough; a member adjustablymounted within the tube and adapted to be raised or lowered relativethereto, and on the lower end of which is secured an illuminator; aninverted opaque cone surrounding said illuminator and having areflecting interior surface, said cone being adjustably secured to thecanopy so as to permit adjustment relative to the illuminator and theother reflecting surfaces; a translucent member at the apex of the cone;and means for ventilating the interior' of the cone.

3. A lighting fixture comprising a canopy whose lower surface is areflector; an opaque shield provided with a reflecting surface, open atthe top and concentrically surrounding an illuminator; an inverted coneprovided with an exterior reflecting surface adapted to reflect lightfrom the interior surface of the opaque shield to the lower surface ofthe canopy; a central tube joining the cone and canopy, and extendingtherethrough; and a member adjustably mounted within the tube andadapted to b( raised or lowered relative thereto, and on the lower endof which is secured an illuminator.

- 4. In a lighting fixture a canopy provided with reflecting surfacesangularly disposed to each other; an illuminator and means for adjustingthe same relative to the reflecting surfaces of the canopy; an opaqueshield flaring upwardly and outwardly, and downwardly and outwardly froma point approximately opposite the center of the source of illumination,provided with an interior reflecting surface, and being open at the topand bottom; and means for adjusting the same'relative to the illuminatorand to the canopy.

5. A lighting fixture comprising a canopy having a lower reflectingsurface; an inverted cone having an outer reflecting surface; a centraltube joining the cone and the canopy and extending therethrough; amember adjustably mounted within the tube and adapted to be raised orlowered relative thereto, and on the lower end of which is secured anilluminator; and an opaque shield surrounding the illuminator and having a shape and reflecting surface adapted to reflect the light from theilluminator upward to the cone, the latter being adapted meme? to reflewthe light from the shield to the surrounding said illuminator and havinga lower "surface of the canopy the canopy bereflecting interior surface,said shield belng 1:5 ing adapted toreflect the lig t downward.edjustably secured to the canopy so as to 6. A lighting fixturecomprisinga canopy, permit adjustment relative to the illumi- 5 theunderneath surface of which is a refiecnator and the other reflectingsurfaces; and tor; an invertedcone provided with an exan adjustable andremovable translucent terior reflecting surface secured to the canmemberin the shield beneath the illumina- 20 opy; a central tube joining thecone and the tor. canopy and extending therethrugh; a mem- 10 heradjustably mounted within thetube and JAMES ARTHUR DEMPSEY' adapted tobe raised or lowered relative Wimesses: thereto, and on the lower end of'which is BEATRICE Mmvls,

secured an illuminator: an opaque shield IRENE MANNING.

